Question

A snowmobile has an initial velocity of 3.0 m/s

Answer 1

My answer to the problem is as follows:
 
1. Use the kinematic formula 

Vf = Vi + a*t 

for a, Vi = 3.0 m/s, a = 0.5 m/s/s, and t = 7.o s. 

for b, Vf = 0, Vi = 3.0 m/s, and a = -0.60 m/s/s. 

I hope my answer has come to your help. God bless and have a nice day ahead!

Answer 2

Answer:

Part a)

$v_f = 6.5 m/s$

Part b)

$t = 5 seconds$

Explanation:

Part a)

As we know that

$v_f = v_i + at$

here we know that

$v_i = 3 m/s$

$a = 0.5 m/s^2$

$t = 7.0 s$

so we will have

$v_f = 3 + (0.5)(7.0)$

$v_f = 6.5 m/s$

Part b)

if finally the snowmobile comes to rest

So here we can say that

$v_f = 0$

$v_i = 3.0 m/s$

$a = -0.60 m/s^2$

so now we have

$v_f = v_i + at$

$0 = 3.0 - (0.60)t$

$t = 5 s$